Essential Enhanced Elite

Metals

Nitration

Oxidation

Particle Count

Particle Quantifier (PQ) Index

Total Acid Number (TAN)

Ultracentrifuge

Viscosity* at 40°C or 100°C

Viscosity at 40°C and 100°C

Viscosity Index

Water (Pass/Fail) G

Water Vol % Karl Fischer S

Gas and steam turbine analysis

This service monitors turbine and lubricant conditions to detect premature wear and contamination

Description This service is designed to help you detect premature wear and lubricant contamination before they result in costly downtime or expensive repairs. Turbine analysis is applicable for gas and steam turbines operating in continuous or intermittent service. It includes testing to help improve turbine reliability by monitoring system cleanliness and lubricant performance.

Analysis options — Gas and steam turbine

Potential benefits

Improved equipment reliability by identifying potential failures before they occur

Increased productivity through reduction of unscheduled downtime

Reduced parts replacement and labor costs

Minimized lubricant consumption and disposal with optimized drain interval

Service profile

KeyIncluded test

TAN in lieu of oxidation for select synthetic products

Gas turbine only Steam turbine only

G

S

*Viscosity reported at 40°C or 100°C, based on oil type or service level. Analysis may vary by laboratory, product supplied or oil condition.

Sample frequencySample at OEM recommended frequency or, for general guidance, begin with: Monthly.Adjust frequency based on asset’s economic impact, operating environment, machine age, oil age or sample results trend.

Test Purpose Importance of testMetals To determine the presence and levels of metallic

content in the oil, including contaminants and wear particles

The level of wear metals helps determine if equipment components are wearing or if harmful contamination has entered the oil. The level of metals that are part of the additive chemistry is also reported

Nitration To measure the amount of nitrogen by-products in the oil

Nitration results from the rapid compression of entrained air. As a result, if unchecked, nitrogen and oxidation precursors might form sticky varnishes.

Oxidation To determine the level of lubricant oxidation and deterioration

Oxidation can mean:• Increased wear and corrosion• Shorter equipment life• Increased viscosity• Excessive deposits and plugging

Particle Count Analysis To measure the level of particulate contaminants in the oil

• Cleanliness is a critical factor in the running of turbine oil systems • Debris can interfere in the fine tolerances of the systems, pumps and

valves or cause premature wear

Particle Quantifier (PQ) Index

To determine ferrous metal fatigue failures and metal-to-metal contact not usually detectable with some spectrographic analysis

PQ Index can detect at an early stage:• Anti-friction bearing wear• Plain bearing wear• Gear wear

Total Acid Number (TAN) To measure acidic oil oxidation by-products An elevated Total Acid Number may indicate increased oil acidity resulting from increased oil oxidation

Ultracentrifuge To measure level of insoluble deposit formation in oil

Elevated deposit formation can signify increased potential for varnish formation or represent debris, dirt or dust contamination

Viscosity To determine the oil’s resistance to flow • An increase in viscosity may be due to high insoluble content, water contamination, or admixture with higher viscosity lubricant

• A decrease in viscosity may be due to water contamination, or admixture with lower viscosity lubricant

• Both high or low viscosity may result in premature equipment wear

Viscosity Index To measure the change of viscosity with temperature

Higher VI demonstrates wider operating range. Monitor for cross contamination. Monitor for viscosity shear.

Water To detect presence of water contamination Water contamination may cause severe corrosion and subsequent wear, poor oil film thickness or hydrogen embrittlement

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Mobil ServSM Lubricant Analysis — Gas and steam turbine analysis

mobilserv.mobil.com

By helping you enhance equipment life and reliability — which minimizes maintenance costs and downtime — our expert services can help you achieve your safety, environmental care and productivity goals.

Mobil ServSM Lubricant Analysis When your sample is processed, the laboratory handles each bottle as a unique and important item. Each sample is coded, labeled and tracked through the entire process. By the time test results are available, your equipment sample has directly benefitted from our knowledge of Mobil™ lubricants, decades of OEM relationships and a strong heritage of hands-on application expertise. Sample comments are provided, as required, to help identify potential problems, list possible causes and recommend actions for follow-up.